🎨 #1610 换用guava的相应方法实现base64解码，避免因commons-codec版本问题导致解码异常

weixin-java-cp/src/test/java/me/chanjar/weixin/cp/util/crypto/WxCpCryptUtilTest.java

@@ -0,0 +1,24 @@
+package me.chanjar.weixin.cp.util.crypto;
+
+import com.google.common.base.CharMatcher;
+import com.google.common.io.BaseEncoding;
+import org.apache.commons.codec.binary.Base64;
+import org.testng.annotations.Test;
+
+import static org.testng.Assert.assertEquals;
+
+/**
+ * @author <a href="https://github.com/binarywang">Binary Wang</a>
+ * @date 2020-06-11
+ */
+public class WxCpCryptUtilTest {
+  @Test
+  public void test() {
+    String encodingAesKey = "jWmYm7qr5nMoAUwZRjGtBxmz3KA1tkAj3ykkR6q2B2C";
+    final byte[] commonsCodec = Base64.decodeBase64(encodingAesKey + "=");
+    final byte[] guava = BaseEncoding.base64().decode(CharMatcher.whitespace().removeFrom(encodingAesKey));
+    final byte[] guava1 = BaseEncoding.base64().decode(CharMatcher.whitespace().removeFrom(encodingAesKey + "="));
+    assertEquals(commonsCodec, guava);
+    assertEquals(guava1, guava);
+  }
+}